Have we really become so unempathetic as a society that the act of putting yourself in others’ shoes is unbelievable to the point that people assume you must be part of the group you’re defending? So I often see people being unfairly discriminatory and mean to certain types, attributes or qualities of people, which I know some would be offended and hurt by. But whenever I stick up for them, I get comments like this: “Tell me you’re x without telling me you’re x”. “F*** off, x”. A good example is gay people or trans people. I get heavily criticised for defending them and people immediately assume that I’m gay or trans just because I’m expressing that I empathise with how they’re treated in society and think people should be kinder toward them. There are lots of other examples but I’m worried I’ll be antagonised here just by saying them, so I picked some slightly more socially acceptable ones (yes there are some far less socially acceptable things than LGBT these days, in my experience, despite the rampant LGBTphobia).
Look at it like this:
You’re in a position of privilege where your sexuality and gender identity are part of what constitutes “normal” for most people. All sexualities and genders are normal, of course, as far as I’m concerned. I’m going to guess by the nature of your post that you’re a cis-gender heterosexual male. You have a bit higher percentage of society that’s going to think of your positions as “normal” than, say, that of a gay man or a trans woman.
It’s like when a white person stands up against racism, or men march for women’s rights. When we tolerate intolerance, we allow it to spread. This is a good use of privilege. It’s expected that a gay person will be against homophobia and that a black person will be against racism. Being a “normal” person and being against those things is, by itself, calling out homophobia and racism. The community can use all the allies it can get.
I would point out one thing though. It sounds like you’re made uncomfortable being associated with the ideas behind the slurs. It’s fine to want to be seen as holding your identity, but it could also be because you harbor some negative stereotypes as well, perhaps unconsciously. I wouldn’t be insulted if someone thought I was black, or Mexican, or a trans man. If it’s an honest mistake on their part I might correct them (because it could lead to an awkward situation), but if someone were to call me an inapplicable slur, it would be just funny, not insulting. I might be offended that they thought it was okay to use such a word as an insult, but not that they thought they could insult me with it.